Oil burner



June 2, 1925. l 1,540,37'2

H. J. ALLEN OIL BURNER Filed Aug 19."V 1924 2 sheets-Snam '1 .lune 2, 1925. 1,540,672

H. J. ALLEN 4on. BURNER Filed Aug- 19. 19211 2 sheets-sheet 2 Gwinn,

Patented June 2, 1925.

UNITED STATES `HERMAN J. ALLEN, OF WICHITA, KANEAS.

oIL BURNER.

Application filled August 19, 1924. Serial No. 732,985.

To all whom it may concer-11..'

Be it known that I, HERMAN J. ALLEN, a citizen of the United States, resident of Wichita, in the -county of Sedgwick and State of Kansas, have made Va certain new Iand useful Invention in Oil Burners; and I declare the following to be a full, clear, and exact description of the saine, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompany ing drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure l is a side view of the invention as applied.

Figure 2 is a central vertical longitudinal section of the blower pipe and burner pan and pipes associated therewith, and showing the oil reservoir.

Figure B is a detail section on the line 3-3, Figure 1.

Figure 4 is a central section of burner pan on line 4 4, Figure 5.

Figure 5 is a section of the burner pan on the line 5-5, Figure 4.

Figure 6 is a diagrammatic plan view of the blower and the two motors, showing the electric circuits.

The invention has relation to oil burners.

designed to continuously supply liquid fuel under thermostatic control to domestic and other furnaces or boilers, having for an object to provide improved means for feeding oil to the irepot of a forced draft oilburner by gravity, with the aid of a currentof air within the oil feed tube. Another object is to lstop the flow of oil concurrently with the loss of electric current adding an additional feature of automatic safety control in stopping the flow of oil n hen a condition arises, such as stoppage of the blower, that would prevent the oil from being properly burned, thereby preventing the feed A of y the loil. with production of smoke and soot at av time when by reason of lack of electric current the thermostat is not able l to function to operate the electric motor kcontrolling the oil valve to close the latter ,and stop'the feed of the oil.

Other objects and advantages will hereinafter appear.

The invention consists in the novel construction aiid combinations of parts as set forth in the appended claims. .Y

In the accompanying drawings' illustrating the invention, the numeral 1 designates the furnace or boiler of a heating lant; 2 is the burner .tirepot located in the repot of the furnace; 3 is the blower or fan supplying air under a forced draft, the operating motor for said blower being indicated at 4 and controlled by a thermostat 5, located in one of the rooms of the `house or other place; 6 is the air pipe from blower lto burner firepot; 7 is the gas line terminating in pilot light 8 to ignite the oil to be fed as hereinafter stated; 9 is the oil feed line having therein a valve 25, controlled or opened or c losed by the operation of av specially designed electric motor 22, termed maar `PATENT castes,

a switch motor, and having at one endof the shaft thereof a cam 23, operating a lever 24, to open said valve 25 inthe oil feed line, and at the other end of said .shaft a rotary snap switch 26, operating to open and close an auxiliary circuit to the fan motor 4.

lVhen the thermostat closes the main cirl' cuit to the switch motor 22, the latter is set in motion and continues so until one half revolution of the* crank shaft thereof is made whereupon said switch motor aut-o-l matically disconnects from said circuit. In this movement, they cam and lever on the end of the crank shaft have pulled open the valve 25, permitting oil to iiow from the storage tank and the rotary snap switch on the other end of the crank shaft has closed the auxiliary circuit to the fan motor, there by setting the latter in motion. The switch motor comes to rest leaving air and oil flowing into the firepot of the burner, combustion taking place therein continuously until the thermostat again` operates the switch inotor.- ilVhen the thermostat next again operates` the switch motor, the .latter is reconnected to said auxiliary circuit,

whereupon 4the crank shaft is again rotated one halfQa-round, the cam and lever on-the other en'dl of the crank shaft closing the said valve 25 in the oil feed line, and the rotarsnap switch on the other end ofthe crank r'shaft opening the circuit to the fan motor,` thereby causing the latter to stop', In this position, the switch motor again automatically disconnects from; the main circuitand is at rest until the thermostat again starts it to set the burner in action. y

Located in the blower pipe 6, is a tube 10,l bowed upwardly orhumpedat l1, and bth ends of said tube being open, onev end `'aerinip ioii iii)

hating at the circumferential wall of the burner'lirepot within a recess thereof at 12. This oil feed tube 10 is provided with two legs 13 and 14, each of which has a downward inclination from its highest point 13,- at the bend or hump thereof, and 'the leg leading to the burner iirepot is preferably shorter than 'the "other leg and of steeper incline. The blower pipe 6 is usually horizontal.

The oil feed pipe opens into the longer leg of said tube 10 at point 15, about midway of the length of said leg, and the reservoir 16 for oil is arranged sufliciently high so that the entire contents thereof will drain through force of gravity, the valve 25 being open, to point 15 of the tube 10, and in case the blower is not operating through lack of electric current, said -oil will drain downwardly through the lower half of the leg 13 of said tube, this being the easiest course forthe oil to take, and will pass out of tube 10 at drain opening 18 located near the lower end of said leg, and immediately below which is located the drip cup 19, working in conjunction with the usuali safety valve 20, to cut ofi the ow of oil in the pipe line 9 upon fall of said cup through weight of .oil accumulating therein, a drain pipe 21 from the bottom. of the burner firepot also communicating with said drip cup, which is thereby caused to do a double automatic service, namely to stop the ow of the oil when ignition fails, and to stop the flow of the oil when the electric current fails.

In the operation of the burner, the blower being set intol action by the motor 4, and

the oil valvebeing-opened by temporaryl actuation of lthe switch motor 22, both Vof these a'ctuations being caused by the functioning of they thermostat, the oil will feed by gravity-to the point 15 of the tube 10, and start down the lower' half of the rear leg 13 of said tube, a strongcurrent of air being simultaneously caused to flow continuously through the air pipe 6 and in part through the bowed tube 10 in the same line as said air pipe, the air passing through said tube carrying the oil fed as aforesaid therewith continuously through tube 4l() to the burner lirepot, the current of air entering the burner firepot tangentially thereof at 17, and liowing circumferentially of said lirepot in a rotary manner, and the oil carried therewith taking the same course. v

The amount of air passing through the tube 10 will be approximately proportionate the comparative cross sectional areas or diameters of said tube and of the air pipe 6.

in the feed of the oil` as stated, the oil will pass up the incline of the longer leg of the tube 10, over 'the highestpoint 11 thereof and down the incline of the shorter leg of said tube to the burner frepot, being ignited by the q...-ot 8.

Upon stoppage ot' the blower, through i.failure of the electric current, in which case the thermostat will not function, the switch motor 22 will not be operated to close the oil valve, and the oil will continue to feed to point 15 of the tube 10, through 'torce of gravity, but there being now no air current to carry the oil upwardly in the forward ieg of the tube 10, theoil will take the easiest course and drain downwardly through the lower half of said leg to the drain opening 18 as aforesaid, and actuate the safety valve lever to close the safety valve and stop the flow of oil.

The oil remaining in the shorter leg of the tube 10, upon stoppage of the blower as stated, will'drain downwardly therein to the burner repot, which is provided vwith drain communication 21 with the drip cup as aforesaid.

I claim 1. In an oil burner-a firepot, a blower havlng an air pipe communicating with said irepot, an inclined oil feed tube in said air pipe having both ends open and provided with a drain opening near its lower end, an 011 reservoir having a pipe communicating with said oil feedV tube and adapted to establish a gravity feed of the oil, part of the air feed from said blower passing through said oil feed tube and carrying the oil therewith, a drip cup bepeath 'said drain opening anda cut-off safety valve in the oil pipe line operating in connection therewith.

2. In an oil burnerfa firepot, a blower having an air pipe communicating with said irepot, a bent oil feed tube in said air pipe and having both ends open and two legs each of which is inclined downwardly from the bend of said tube, and having a drain opening near the lower end of the outer leg, an oil reservoir having a pipe communicating with the louter leg of said tube intermediate the length thereof and atlapted to establish a gravity feed of the oif, part of the air feed from said blower passing though said oil feed tube and carryin the oil therewith7 a drip cup beneath said opening and a cut-off safety valve in the oil pipe line operating in connection therewith.

3. In an oil burner a firepot, a blower having an air-pipe communicating lwith said lirepot, .a bent oil feed tube in said air pipe and having both' ends open and two legs each inclined downwardly from the bend of the tube, an oil reservoir having a pipe communicating with the outer leg of said tube intermediate the length thereof and adapt- 'ed to establish a gravity feed of the oil, part of the air feed from said blower passing though said oil feed tube and carrying the oil therewith, the outer leg of said tube having a drain opening near its lower end, a drip cup beneath said drain opening and a cut-oit' safety valve in the oil pipe line oprain mmm

eratin in connection therewith,'and a drain pipe rom the irepot of the furnace terminatingalso over said drip clip.

4. In an oil burner a iirepot, la blower having an air pi e communicating with said impot, an ine ined oil feed tube in said air pipe and having both ends open, an oil reservoir having a pipe communicating with said tube intermediate the length thereof and adapted to establish a gravity feed of the oil, part of the air feed from said blower passing through said oil feed tube and ear vying the oil therewith, said tube having a drain opening near its iovver end, a drip cup beneath said drain opening, a out-ofi' safety valve in said oil pipe line operating in connection with said cop, a second valve inthe oil pipe line, and a switch motor having a thermostatie control and controlling said second valve. In testimony whereof i affix my si ature. HERMAN JL AIIEN. 

